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4F. structure (.)
<ptr2object>.<memberofobject> builds a <varexp>
The pointer has to be declared as PTR TO <object> or ARRAY OF <object>
(see 8D for these), and the member has to be a legal
object identifier. Note that reading a subobject in an object this
way results in a pointer to that object. Examples:
If the member you select is of type PTR TO <type>, you may use "."
and "" to dereference further values. If you select an ARRAY or
substructure in an OBJECT, the result is again a PTR.